ZIMASILK 22 Momme Mulberry Silk Sleep Mask

Quick verdict

ZIMASILK occupies a useful position between the Alaska Bear (thin, light, excellent value) and the Slip Contour (premium, contoured, expensive). It uses 22-momme mulberry silk — the denser grade you’d find in premium masks — and adds a soft silk filling that cushions the face and blocks more light than a single fabric layer. The result is one of the best mid-range masks available: more substance than a budget pick, significantly cheaper than the luxury tier, and genuinely comfortable for the majority of sleeping positions.

What we found

The most immediate thing about the ZIMASILK is the weight in hand. The silk filling gives it a noticeably cushioned, pillow-like quality that flat masks don’t have. When you press gently on the front of the mask, it compresses slightly like a thin pillow. When it’s on your face, that filling conforms softly to the contours around your eye socket.

I tested the ZIMASILK for three weeks as my primary mask, switching between it and the Alaska Bear on alternating nights to keep a clear comparison point. The difference in feel is significant. The ZIMASILK felt more like wearing a small luxurious pillow over my eyes; the Alaska Bear felt like wearing almost nothing. Which you prefer depends heavily on what you’re optimizing for. Hot sleepers will gravitate toward Alaska Bear’s feathery lightness. Anyone who has always wished their mask had a bit more cushion will find the ZIMASILK more satisfying.

Light blocking is meaningfully better than a flat mask. The filling creates a slight buffer between the silk and your face, which reduces the direct pressure on the eyelids while simultaneously improving the light seal at the edges. In my testing, I noticed significantly less light intrusion at the nose bridge compared to the Alaska Bear, and the overall experience was noticeably darker — without any contour cups.

The strap is generous and adjustable, with a wide enough range to accommodate larger head sizes that some cheaper masks can’t fit. I have a fairly large head and often find that budget mask straps don’t extend far enough; the ZIMASILK reached a comfortable fit with room to spare.

The silk quality

The ZIMASILK shell uses 22-momme mulberry silk. At 22 momme, the weave is denser than the 19-momme used in the Alaska Bear and comparable to the premium materials used in the Blissy and Slip. The practical difference for a sleep mask is twofold: better light blocking from a thicker weave, and greater durability through repeated washing.

The filling is also described as silk, which adds softness and the gentle cushioning effect. Silk filling retains some of the same thermoregulating properties as the woven shell, though the combined insulation of shell plus fill makes the mask slightly warmer than an unfilled alternative.

I washed the mask five times over three weeks using cold water and a gentle detergent. The shell retained its feel and color without change. The filling distributed evenly after each wash and didn’t clump — provided you handle the mask gently and lay it flat to dry rather than tumble drying it.

Light blocking and comfort

Light blocking puts the ZIMASILK clearly above flat single-layer masks and clearly below a contoured foam design. In a dark bedroom, it’s essentially complete. In hotel rooms with light gaps, it handled all but the most aggressive scenarios — one room with a bright LED street lamp directly outside required me to add a towel over my eyes, which would have been true of almost any non-contoured mask.

Comfort is the strongest category for the ZIMASILK. The filled silk is soft enough that I don’t feel the mask touching my eyelids even though it does — the cushioning spreads the contact across a wider area than a flat mask would, reducing point pressure. This also makes the ZIMASILK friendlier for people who find flat masks uncomfortable against their lids, without requiring the full engineering of a contoured cup design.

The warmth trade-off is real. On nights above 70°F I noticed the mask slightly more than I notice the Alaska Bear. It’s not uncomfortable — silk breathes better than foam regardless — but hot sleepers should factor this in.

How it compares

Against the Alaska Bear (19-momme, flat): Alaska Bear is significantly cheaper and lighter. If breathability and minimal face weight are your priorities, choose Alaska Bear. If you want more light blocking and a cushioned feel and can spend slightly more, ZIMASILK is a meaningful upgrade.

Against the Blissy (22-momme, flat): Both use 22-momme mulberry silk. Blissy is flat with a silk-wrapped strap and OEKO-TEX certification; ZIMASILK has the silk filling for more cushion. Blissy wins on brand track record and strap quality. ZIMASILK wins on light blocking (due to fill) and value. If the filling appeals to you, ZIMASILK is the better choice at its price point.

Against the Slip Contour (22-momme, contoured): The Slip uses full 3D cups to lift silk entirely off the eyelids. For lash extensions and total no-contact blackout, only the Slip delivers that. If you don’t need lash clearance and want a cushioned feel at a lower price, ZIMASILK is a legitimate alternative.

Who this is for

• People who want 22-momme silk quality without the premium price
• Anyone who finds flat masks uncomfortable and wants something cushioned without going full contoured
• Back sleepers and light side sleepers who want more darkness than a flat mask provides
• People who have tried budget silk masks and want a noticeable upgrade

Who should skip it

• Hot sleepers who prioritize maximum breathability — the filling adds warmth; choose Alaska Bear instead
• Lash extension wearers who need full eye clearance — the Slip Contour is the correct choice
• Anyone who machine washes their masks — the filling will degrade and clump; this mask requires hand washing

Care and durability

Hand wash only in cool water with a mild silk detergent. Do not machine wash, wring, or tumble dry — the silk filling will clump and lose its even distribution. After washing, gently press flat between dry towels to absorb water, then reshape and lay flat to dry. The filling should redistribute evenly once dry.

With proper care, expect 18 months to two years of regular use. The shell silk is durable at 22-momme; the filling is the more delicate component. Treat each wash as you’d treat washing a delicate padded item and the mask will hold its shape well over that timespan.